Quelle  test_bridge_backup_port.sh   Sprache: Shell

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# This test is for checking bridge backup port and backup nexthop ID
# functionality. The topology consists of two bridge (VTEPs) connected using
# VXLAN. The test checks that when the switch port (swp1) is down, traffic is
# redirected to the VXLAN port (vx0). When a backup nexthop ID is configured,
# the test checks that traffic is redirected with the correct nexthop
# information.
#
# +------------------------------------+ +------------------------------------+
# |    + swp1                   + vx0  | |    + swp1                   + vx0  |
# |    |                        |      | |    |                        |      |
# |    |           br0          |      | |    |                        |      |
# |    +------------+-----------+      | |    +------------+-----------+      |
# |                 |                  | |                 |                  |
# |                 |                  | |                 |                  |
# |                 +                  | |                 +                  |
# |                br0                 | |                br0                 |
# |                 +                  | |                 +                  |
# |                 |                  | |                 |                  |
# |                 |                  | |                 |                  |
# |                 +                  | |                 +                  |
# |              br0.10                | |              br0.10                |
# |           192.0.2.65/28            | |            192.0.2.66/28           |
# |                                    | |                                    |
# |                                    | |                                    |
# |                 192.0.2.33         | |                 192.0.2.34         |
# |                 + lo               | |                 + lo               |
# |                                    | |                                    |
# |                                    | |                                    |
# |                   192.0.2.49/28    | |    192.0.2.50/28                   |
# |                           veth0 +-------+ veth0                           |
# |                                    | |                                    |
# | sw1                                | | sw2                                |
# +------------------------------------+ +------------------------------------+

source lib.sh
ret=0

# All tests in this script. Can be overridden with -t option.
TESTS="
 backup_port
 backup_nhid
 backup_nhid_invalid
 backup_nhid_ping
 backup_nhid_torture
"
VERBOSE=0
PAUSE_ON_FAIL=no
PAUSE=no
PING_TIMEOUT=5

################################################################################
# Utilities

log_test()
{
 local rc=$1
 local expected=$2
 local msg="$3"

 if [ ${rc} -eq ${expected} ]; then
  printf "TEST: %-60s [ OK ]\n" "${msg}"
  nsuccess=$((nsuccess+1))
 else
  ret=1
  nfail=$((nfail+1))
  printf "TEST: %-60s [FAIL]\n" "${msg}"
  if [ "$VERBOSE" = "1" ]; then
   echo " rc=$rc, expected $expected"
  fi

  if [ "${PAUSE_ON_FAIL}" = "yes" ]; then
  echo
   echo "hit enter to continue, 'q' to quit"
   read a
   [ "$a" = "q" ] && exit 1
  fi
 fi

 if [ "${PAUSE}" = "yes" ]; then
  echo
  echo "hit enter to continue, 'q' to quit"
  read a
  [ "$a" = "q" ] && exit 1
 fi

 [ "$VERBOSE" = "1" ] && echo
}

run_cmd()
{
 local cmd="$1"
 local out
 local stderr="2>/dev/null"

 if [ "$VERBOSE" = "1" ]; then
  printf "COMMAND: $cmd\n"
  stderr=
 fi

 out=$(eval $cmd $stderr)
 rc=$?
 if [ "$VERBOSE" = "1" -a -n "$out" ]; then
  echo " $out"
 fi

 return $rc
}

tc_check_packets()
{
 local ns=$1; shift
 local id=$1; shift
 local handle=$1; shift
 local count=$1; shift
 local pkts

 sleep 0.1
 pkts=$(tc -n $ns -j -s filter show $id \
  | jq ".[] | select(.options.handle == $handle) | \
  .options.actions[0].stats.packets")
 [[ $pkts == $count ]]
}

bridge_link_check()
{
 local ns=$1; shift
 local dev=$1; shift
 local state=$1; shift

 bridge -n $ns -d -j link show dev $dev | \
  jq -e ".[][\"state\"] == \"$state\"" &> /dev/null
}

################################################################################
# Setup

setup_topo_ns()
{
 local ns=$1; shift

 ip netns exec $ns sysctl -qw net.ipv6.conf.all.keep_addr_on_down=1
 ip netns exec $ns sysctl -qw net.ipv6.conf.default.ignore_routes_with_linkdown=1
 ip netns exec $ns sysctl -qw net.ipv6.conf.all.accept_dad=0
 ip netns exec $ns sysctl -qw net.ipv6.conf.default.accept_dad=0
}

setup_topo()
{
 local ns

 setup_ns sw1 sw2
 for ns in $sw1 $sw2; do
  setup_topo_ns $ns
 done

 ip link add name veth0 type veth peer name veth1
 ip link set dev veth0 netns $sw1 name veth0
 ip link set dev veth1 netns $sw2 name veth0
}

setup_sw_common()
{
 local ns=$1; shift
 local local_addr=$1; shift
 local remote_addr=$1; shift
 local veth_addr=$1; shift
 local gw_addr=$1; shift
 local br_addr=$1; shift

 ip -n $ns address add $local_addr/32 dev lo

 ip -n $ns link set dev veth0 up
 ip -n $ns address add $veth_addr/28 dev veth0
 ip -n $ns route add default via $gw_addr

 ip -n $ns link add name br0 up type bridge vlan_filtering 1 \
  vlan_default_pvid 0 mcast_snooping 0

 ip -n $ns link add link br0 name br0.10 up type vlan id 10
 bridge -n $ns vlan add vid 10 dev br0 self
 ip -n $ns address add $br_addr/28 dev br0.10

 ip -n $ns link add name swp1 up type dummy
 ip -n $ns link set dev swp1 master br0
 bridge -n $ns vlan add vid 10 dev swp1 untagged

 ip -n $ns link add name vx0 up master br0 type vxlan \
  local $local_addr dstport 4789 nolearning external
 bridge -n $ns link set dev vx0 vlan_tunnel on learning off

 bridge -n $ns vlan add vid 10 dev vx0
 bridge -n $ns vlan add vid 10 dev vx0 tunnel_info id 10010
}

setup_sw1()
{
 local ns=$sw1
 local local_addr=192.0.2.33
 local remote_addr=192.0.2.34
 local veth_addr=192.0.2.49
 local gw_addr=192.0.2.50
 local br_addr=192.0.2.65

 setup_sw_common $ns $local_addr $remote_addr $veth_addr $gw_addr \
  $br_addr
}

setup_sw2()
{
 local ns=$sw2
 local local_addr=192.0.2.34
 local remote_addr=192.0.2.33
 local veth_addr=192.0.2.50
 local gw_addr=192.0.2.49
 local br_addr=192.0.2.66

 setup_sw_common $ns $local_addr $remote_addr $veth_addr $gw_addr \
  $br_addr
}

setup()
{
 set -e

 setup_topo
 setup_sw1
 setup_sw2

 sleep 5

 set +e
}

cleanup()
{
 cleanup_ns $sw1 $sw2
}

################################################################################
# Tests

backup_port()
{
 local dmac=00:11:22:33:44:55
 local smac=00:aa:bb:cc:dd:ee

 echo
 echo "Backup port"
 echo "-----------"

 run_cmd "tc -n $sw1 qdisc replace dev swp1 clsact"
 run_cmd "tc -n $sw1 filter replace dev swp1 egress pref 1 handle 101 proto ip flower src_mac $smac dst_mac $dmac action pass"

 run_cmd "tc -n $sw1 qdisc replace dev vx0 clsact"
 run_cmd "tc -n $sw1 filter replace dev vx0 egress pref 1 handle 101 proto ip flower src_mac $smac dst_mac $dmac action pass"

 run_cmd "bridge -n $sw1 fdb replace $dmac dev swp1 master static vlan 10"

 # Initial state - check that packets are forwarded out of swp1 when it
 # has a carrier and not forwarded out of any port when it does not have
 # a carrier.
 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 1
 log_test $? 0 "Forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 0
 log_test $? 0 "No forwarding out of vx0"

 run_cmd "ip -n $sw1 link set dev swp1 carrier off"
 busywait $BUSYWAIT_TIMEOUT bridge_link_check $sw1 swp1 disabled
 log_test $? 0 "swp1 carrier off"

 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 1
 log_test $? 0 "No forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 0
 log_test $? 0 "No forwarding out of vx0"

 run_cmd "ip -n $sw1 link set dev swp1 carrier on"
 busywait $BUSYWAIT_TIMEOUT bridge_link_check $sw1 swp1 forwarding
 log_test $? 0 "swp1 carrier on"

 # Configure vx0 as the backup port of swp1 and check that packets are
 # forwarded out of swp1 when it has a carrier and out of vx0 when swp1
 # does not have a carrier.
 run_cmd "bridge -n $sw1 link set dev swp1 backup_port vx0"
 run_cmd "bridge -n $sw1 -d link show dev swp1 | grep \"backup_port vx0\""
 log_test $? 0 "vx0 configured as backup port of swp1"

 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 2
 log_test $? 0 "Forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 0
 log_test $? 0 "No forwarding out of vx0"

 run_cmd "ip -n $sw1 link set dev swp1 carrier off"
 busywait $BUSYWAIT_TIMEOUT bridge_link_check $sw1 swp1 disabled
 log_test $? 0 "swp1 carrier off"

 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 2
 log_test $? 0 "No forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 1
 log_test $? 0 "Forwarding out of vx0"

 run_cmd "ip -n $sw1 link set dev swp1 carrier on"
 busywait $BUSYWAIT_TIMEOUT bridge_link_check $sw1 swp1 forwarding
 log_test $? 0 "swp1 carrier on"

 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 3
 log_test $? 0 "Forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 1
 log_test $? 0 "No forwarding out of vx0"

 # Remove vx0 as the backup port of swp1 and check that packets are no
 # longer forwarded out of vx0 when swp1 does not have a carrier.
 run_cmd "bridge -n $sw1 link set dev swp1 nobackup_port"
 run_cmd "bridge -n $sw1 -d link show dev swp1 | grep \"backup_port vx0\""
 log_test $? 1 "vx0 not configured as backup port of swp1"

 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 4
 log_test $? 0 "Forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 1
 log_test $? 0 "No forwarding out of vx0"

 run_cmd "ip -n $sw1 link set dev swp1 carrier off"
 busywait $BUSYWAIT_TIMEOUT bridge_link_check $sw1 swp1 disabled
 log_test $? 0 "swp1 carrier off"

 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 4
 log_test $? 0 "No forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 1
 log_test $? 0 "No forwarding out of vx0"
}

backup_nhid()
{
 local dmac=00:11:22:33:44:55
 local smac=00:aa:bb:cc:dd:ee

 echo
 echo "Backup nexthop ID"
 echo "-----------------"

 run_cmd "tc -n $sw1 qdisc replace dev swp1 clsact"
 run_cmd "tc -n $sw1 filter replace dev swp1 egress pref 1 handle 101 proto ip flower src_mac $smac dst_mac $dmac action pass"

 run_cmd "tc -n $sw1 qdisc replace dev vx0 clsact"
 run_cmd "tc -n $sw1 filter replace dev vx0 egress pref 1 handle 101 proto ip flower src_mac $smac dst_mac $dmac action pass"

 run_cmd "ip -n $sw1 nexthop replace id 1 via 192.0.2.34 fdb"
 run_cmd "ip -n $sw1 nexthop replace id 2 via 192.0.2.34 fdb"
 run_cmd "ip -n $sw1 nexthop replace id 10 group 1/2 fdb"

 run_cmd "bridge -n $sw1 fdb replace $dmac dev swp1 master static vlan 10"
 run_cmd "bridge -n $sw1 fdb replace $dmac dev vx0 self static dst 192.0.2.36 src_vni 10010"

 run_cmd "ip -n $sw2 address replace 192.0.2.36/32 dev lo"

 # The first filter matches on packets forwarded using the backup
 # nexthop ID and the second filter matches on packets forwarded using a
 # regular VXLAN FDB entry.
 run_cmd "tc -n $sw2 qdisc replace dev vx0 clsact"
 run_cmd "tc -n $sw2 filter replace dev vx0 ingress pref 1 handle 101 proto ip flower src_mac $smac dst_mac $dmac enc_key_id 10010 enc_dst_ip 192.0.2.34 action pass"
 run_cmd "tc -n $sw2 filter replace dev vx0 ingress pref 1 handle 102 proto ip flower src_mac $smac dst_mac $dmac enc_key_id 10010 enc_dst_ip 192.0.2.36 action pass"

 # Configure vx0 as the backup port of swp1 and check that packets are
 # forwarded out of swp1 when it has a carrier and out of vx0 when swp1
 # does not have a carrier. When packets are forwarded out of vx0, check
 # that they are forwarded by the VXLAN FDB entry.
 run_cmd "bridge -n $sw1 link set dev swp1 backup_port vx0"
 run_cmd "bridge -n $sw1 -d link show dev swp1 | grep \"backup_port vx0\""
 log_test $? 0 "vx0 configured as backup port of swp1"

 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 1
 log_test $? 0 "Forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 0
 log_test $? 0 "No forwarding out of vx0"

 run_cmd "ip -n $sw1 link set dev swp1 carrier off"
 busywait $BUSYWAIT_TIMEOUT bridge_link_check $sw1 swp1 disabled
 log_test $? 0 "swp1 carrier off"

 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 1
 log_test $? 0 "No forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 1
 log_test $? 0 "Forwarding out of vx0"
 tc_check_packets $sw2 "dev vx0 ingress" 101 0
 log_test $? 0 "No forwarding using backup nexthop ID"
 tc_check_packets $sw2 "dev vx0 ingress" 102 1
 log_test $? 0 "Forwarding using VXLAN FDB entry"

 run_cmd "ip -n $sw1 link set dev swp1 carrier on"
 busywait $BUSYWAIT_TIMEOUT bridge_link_check $sw1 swp1 forwarding
 log_test $? 0 "swp1 carrier on"

 # Configure nexthop ID 10 as the backup nexthop ID of swp1 and check
 # that when packets are forwarded out of vx0, they are forwarded using
 # the backup nexthop ID.
 run_cmd "bridge -n $sw1 link set dev swp1 backup_nhid 10"
 run_cmd "bridge -n $sw1 -d link show dev swp1 | grep \"backup_nhid 10\""
 log_test $? 0 "nexthop ID 10 configured as backup nexthop ID of swp1"

 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 2
 log_test $? 0 "Forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 1
 log_test $? 0 "No forwarding out of vx0"

 run_cmd "ip -n $sw1 link set dev swp1 carrier off"
 busywait $BUSYWAIT_TIMEOUT bridge_link_check $sw1 swp1 disabled
 log_test $? 0 "swp1 carrier off"

 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 2
 log_test $? 0 "No forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 2
 log_test $? 0 "Forwarding out of vx0"
 tc_check_packets $sw2 "dev vx0 ingress" 101 1
 log_test $? 0 "Forwarding using backup nexthop ID"
 tc_check_packets $sw2 "dev vx0 ingress" 102 1
 log_test $? 0 "No forwarding using VXLAN FDB entry"

 run_cmd "ip -n $sw1 link set dev swp1 carrier on"
 busywait $BUSYWAIT_TIMEOUT bridge_link_check $sw1 swp1 forwarding
 log_test $? 0 "swp1 carrier on"

 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 3
 log_test $? 0 "Forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 2
 log_test $? 0 "No forwarding out of vx0"
 tc_check_packets $sw2 "dev vx0 ingress" 101 1
 log_test $? 0 "No forwarding using backup nexthop ID"
 tc_check_packets $sw2 "dev vx0 ingress" 102 1
 log_test $? 0 "No forwarding using VXLAN FDB entry"

 # Reset the backup nexthop ID to 0 and check that packets are no longer
 # forwarded using the backup nexthop ID when swp1 does not have a
 # carrier and are instead forwarded by the VXLAN FDB.
 run_cmd "bridge -n $sw1 link set dev swp1 backup_nhid 0"
 run_cmd "bridge -n $sw1 -d link show dev swp1 | grep \"backup_nhid\""
 log_test $? 1 "No backup nexthop ID configured for swp1"

 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 4
 log_test $? 0 "Forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 2
 log_test $? 0 "No forwarding out of vx0"
 tc_check_packets $sw2 "dev vx0 ingress" 101 1
 log_test $? 0 "No forwarding using backup nexthop ID"
 tc_check_packets $sw2 "dev vx0 ingress" 102 1
 log_test $? 0 "No forwarding using VXLAN FDB entry"

 run_cmd "ip -n $sw1 link set dev swp1 carrier off"
 busywait $BUSYWAIT_TIMEOUT bridge_link_check $sw1 swp1 disabled
 log_test $? 0 "swp1 carrier off"

 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 4
 log_test $? 0 "No forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 3
 log_test $? 0 "Forwarding out of vx0"
 tc_check_packets $sw2 "dev vx0 ingress" 101 1
 log_test $? 0 "No forwarding using backup nexthop ID"
 tc_check_packets $sw2 "dev vx0 ingress" 102 2
 log_test $? 0 "Forwarding using VXLAN FDB entry"
}

backup_nhid_invalid()
{
 local dmac=00:11:22:33:44:55
 local smac=00:aa:bb:cc:dd:ee
 local tx_drop

 echo
 echo "Backup nexthop ID - invalid IDs"
 echo "-------------------------------"

 # Check that when traffic is redirected with an invalid nexthop ID, it
 # is forwarded out of the VXLAN port, but dropped by the VXLAN driver
 # and does not crash the host.

 run_cmd "tc -n $sw1 qdisc replace dev swp1 clsact"
 run_cmd "tc -n $sw1 filter replace dev swp1 egress pref 1 handle 101 proto ip flower src_mac $smac dst_mac $dmac action pass"

 run_cmd "tc -n $sw1 qdisc replace dev vx0 clsact"
 run_cmd "tc -n $sw1 filter replace dev vx0 egress pref 1 handle 101 proto ip flower src_mac $smac dst_mac $dmac action pass"
 # Drop all other Tx traffic to avoid changes to Tx drop counter.
 run_cmd "tc -n $sw1 filter replace dev vx0 egress pref 2 handle 102 proto all matchall action drop"

 tx_drop=$(ip -n $sw1 -s -j link show dev vx0 | jq '.[]["stats64"]["tx"]["dropped"]')

 run_cmd "ip -n $sw1 nexthop replace id 1 via 192.0.2.34 fdb"
 run_cmd "ip -n $sw1 nexthop replace id 2 via 192.0.2.34 fdb"
 run_cmd "ip -n $sw1 nexthop replace id 10 group 1/2 fdb"

 run_cmd "bridge -n $sw1 fdb replace $dmac dev swp1 master static vlan 10"

 run_cmd "tc -n $sw2 qdisc replace dev vx0 clsact"
 run_cmd "tc -n $sw2 filter replace dev vx0 ingress pref 1 handle 101 proto ip flower src_mac $smac dst_mac $dmac enc_key_id 10010 enc_dst_ip 192.0.2.34 action pass"

 # First, check that redirection works.
 run_cmd "bridge -n $sw1 link set dev swp1 backup_port vx0"
 run_cmd "bridge -n $sw1 -d link show dev swp1 | grep \"backup_port vx0\""
 log_test $? 0 "vx0 configured as backup port of swp1"

 run_cmd "bridge -n $sw1 link set dev swp1 backup_nhid 10"
 run_cmd "bridge -n $sw1 -d link show dev swp1 | grep \"backup_nhid 10\""
 log_test $? 0 "Valid nexthop as backup nexthop"

 run_cmd "ip -n $sw1 link set dev swp1 carrier off"
 busywait $BUSYWAIT_TIMEOUT bridge_link_check $sw1 swp1 disabled
 log_test $? 0 "swp1 carrier off"

 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 0
 log_test $? 0 "No forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 1
 log_test $? 0 "Forwarding out of vx0"
 tc_check_packets $sw2 "dev vx0 ingress" 101 1
 log_test $? 0 "Forwarding using backup nexthop ID"
 run_cmd "ip -n $sw1 -s -j link show dev vx0 | jq -e '.[][\"stats64\"][\"tx\"][\"dropped\"] == $tx_drop'"
 log_test $? 0 "No Tx drop increase"

 # Use a non-existent nexthop ID.
 run_cmd "bridge -n $sw1 link set dev swp1 backup_nhid 20"
 run_cmd "bridge -n $sw1 -d link show dev swp1 | grep \"backup_nhid 20\""
 log_test $? 0 "Non-existent nexthop as backup nexthop"

 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 0
 log_test $? 0 "No forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 2
 log_test $? 0 "Forwarding out of vx0"
 tc_check_packets $sw2 "dev vx0 ingress" 101 1
 log_test $? 0 "No forwarding using backup nexthop ID"
 run_cmd "ip -n $sw1 -s -j link show dev vx0 | jq -e '.[][\"stats64\"][\"tx\"][\"dropped\"] == $((tx_drop + 1))'"
 log_test $? 0 "Tx drop increased"

 # Use a blckhole nexthop.
 run_cmd "ip -n $sw1 nexthop replace id 30 blackhole"
 run_cmd "bridge -n $sw1 link set dev swp1 backup_nhid 30"
 run_cmd "bridge -n $sw1 -d link show dev swp1 | grep \"backup_nhid 30\""
 log_test $? 0 "Blackhole nexthop as backup nexthop"

 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 0
 log_test $? 0 "No forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 3
 log_test $? 0 "Forwarding out of vx0"
 tc_check_packets $sw2 "dev vx0 ingress" 101 1
 log_test $? 0 "No forwarding using backup nexthop ID"
 run_cmd "ip -n $sw1 -s -j link show dev vx0 | jq -e '.[][\"stats64\"][\"tx\"][\"dropped\"] == $((tx_drop + 2))'"
 log_test $? 0 "Tx drop increased"

 # Non-group FDB nexthop.
 run_cmd "bridge -n $sw1 link set dev swp1 backup_nhid 1"
 run_cmd "bridge -n $sw1 -d link show dev swp1 | grep \"backup_nhid 1\""
 log_test $? 0 "Non-group FDB nexthop as backup nexthop"

 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 0
 log_test $? 0 "No forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 4
 log_test $? 0 "Forwarding out of vx0"
 tc_check_packets $sw2 "dev vx0 ingress" 101 1
 log_test $? 0 "No forwarding using backup nexthop ID"
 run_cmd "ip -n $sw1 -s -j link show dev vx0 | jq -e '.[][\"stats64\"][\"tx\"][\"dropped\"] == $((tx_drop + 3))'"
 log_test $? 0 "Tx drop increased"

 # IPv6 address family nexthop.
 run_cmd "ip -n $sw1 nexthop replace id 100 via 2001:db8:100::1 fdb"
 run_cmd "ip -n $sw1 nexthop replace id 200 via 2001:db8:100::1 fdb"
 run_cmd "ip -n $sw1 nexthop replace id 300 group 100/200 fdb"
 run_cmd "bridge -n $sw1 link set dev swp1 backup_nhid 300"
 run_cmd "bridge -n $sw1 -d link show dev swp1 | grep \"backup_nhid 300\""
 log_test $? 0 "IPv6 address family nexthop as backup nexthop"

 run_cmd "ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 1"
 tc_check_packets $sw1 "dev swp1 egress" 101 0
 log_test $? 0 "No forwarding out of swp1"
 tc_check_packets $sw1 "dev vx0 egress" 101 5
 log_test $? 0 "Forwarding out of vx0"
 tc_check_packets $sw2 "dev vx0 ingress" 101 1
 log_test $? 0 "No forwarding using backup nexthop ID"
 run_cmd "ip -n $sw1 -s -j link show dev vx0 | jq -e '.[][\"stats64\"][\"tx\"][\"dropped\"] == $((tx_drop + 4))'"
 log_test $? 0 "Tx drop increased"
}

backup_nhid_ping()
{
 local sw1_mac
 local sw2_mac

 echo
 echo "Backup nexthop ID - ping"
 echo "------------------------"

 # Test bidirectional traffic when traffic is redirected in both VTEPs.
 sw1_mac=$(ip -n $sw1 -j -p link show br0.10 | jq -r '.[]["address"]')
 sw2_mac=$(ip -n $sw2 -j -p link show br0.10 | jq -r '.[]["address"]')

 run_cmd "bridge -n $sw1 fdb replace $sw2_mac dev swp1 master static vlan 10"
 run_cmd "bridge -n $sw2 fdb replace $sw1_mac dev swp1 master static vlan 10"

 run_cmd "ip -n $sw1 neigh replace 192.0.2.66 lladdr $sw2_mac nud perm dev br0.10"
 run_cmd "ip -n $sw2 neigh replace 192.0.2.65 lladdr $sw1_mac nud perm dev br0.10"

 run_cmd "ip -n $sw1 nexthop replace id 1 via 192.0.2.34 fdb"
 run_cmd "ip -n $sw2 nexthop replace id 1 via 192.0.2.33 fdb"
 run_cmd "ip -n $sw1 nexthop replace id 10 group 1 fdb"
 run_cmd "ip -n $sw2 nexthop replace id 10 group 1 fdb"

 run_cmd "bridge -n $sw1 link set dev swp1 backup_port vx0"
 run_cmd "bridge -n $sw2 link set dev swp1 backup_port vx0"
 run_cmd "bridge -n $sw1 link set dev swp1 backup_nhid 10"
 run_cmd "bridge -n $sw2 link set dev swp1 backup_nhid 10"

 run_cmd "ip -n $sw1 link set dev swp1 carrier off"
 busywait $BUSYWAIT_TIMEOUT bridge_link_check $sw1 swp1 disabled
 run_cmd "ip -n $sw2 link set dev swp1 carrier off"
 busywait $BUSYWAIT_TIMEOUT bridge_link_check $sw2 swp1 disabled

 run_cmd "ip netns exec $sw1 ping -i 0.1 -c 10 -w $PING_TIMEOUT 192.0.2.66"
 log_test $? 0 "Ping with backup nexthop ID"

 # Reset the backup nexthop ID to 0 and check that ping fails.
 run_cmd "bridge -n $sw1 link set dev swp1 backup_nhid 0"
 run_cmd "bridge -n $sw2 link set dev swp1 backup_nhid 0"

 run_cmd "ip netns exec $sw1 ping -i 0.1 -c 10 -w $PING_TIMEOUT 192.0.2.66"
 log_test $? 1 "Ping after disabling backup nexthop ID"
}

backup_nhid_add_del_loop()
{
 while true; do
  ip -n $sw1 nexthop del id 10
  ip -n $sw1 nexthop replace id 10 group 1/2 fdb
 done >/dev/null 2>&1
}

backup_nhid_torture()
{
 local dmac=00:11:22:33:44:55
 local smac=00:aa:bb:cc:dd:ee
 local pid1
 local pid2
 local pid3

 echo
 echo "Backup nexthop ID - torture test"
 echo "--------------------------------"

 # Continuously send traffic through the backup nexthop while adding and
 # deleting the group. The test is considered successful if nothing
 # crashed.

 run_cmd "ip -n $sw1 nexthop replace id 1 via 192.0.2.34 fdb"
 run_cmd "ip -n $sw1 nexthop replace id 2 via 192.0.2.34 fdb"
 run_cmd "ip -n $sw1 nexthop replace id 10 group 1/2 fdb"

 run_cmd "bridge -n $sw1 fdb replace $dmac dev swp1 master static vlan 10"

 run_cmd "bridge -n $sw1 link set dev swp1 backup_port vx0"
 run_cmd "bridge -n $sw1 link set dev swp1 backup_nhid 10"
 run_cmd "ip -n $sw1 link set dev swp1 carrier off"

 backup_nhid_add_del_loop &
 pid1=$!
 ip netns exec $sw1 mausezahn br0.10 -a $smac -b $dmac -A 198.51.100.1 -B 198.51.100.2 -t ip -p 100 -q -c 0 &
 pid2=$!

 sleep 30
 kill -9 $pid1 $pid2
 wait $pid1 $pid2 2>/dev/null

 log_test 0 0 "Torture test"
}

################################################################################
# Usage

usage()
{
 cat <<EOF
usage: ${0##*/} OPTS

        -t <test>   Test(s) to run (default: all)
                    (options: $TESTS)
        -p          Pause on fail
        -P          Pause after each test before cleanup
        -v          Verbose mode (show commands and output)
        -w          Timeout for ping
EOF
}

################################################################################
# Main

trap cleanup EXIT

while getopts ":t:pPvhw:" opt; do
 case $opt in
  t) TESTS=$OPTARG;;
  p) PAUSE_ON_FAIL=yes;;
  P) PAUSE=yes;;
  v) VERBOSE=$(($VERBOSE + 1));;
  w) PING_TIMEOUT=$OPTARG;;
  h) usage; exit 0;;
  *) usage; exit 1;;
 esac
done

# Make sure we don't pause twice.
[ "${PAUSE}" = "yes" ] && PAUSE_ON_FAIL=no

if [ "$(id -u)" -ne 0 ];then
 echo "SKIP: Need root privileges"
 exit $ksft_skip;
fi

if [ ! -x "$(command -v ip)" ]; then
 echo "SKIP: Could not run test without ip tool"
 exit $ksft_skip
fi

if [ ! -x "$(command -v bridge)" ]; then
 echo "SKIP: Could not run test without bridge tool"
 exit $ksft_skip
fi

if [ ! -x "$(command -v tc)" ]; then
 echo "SKIP: Could not run test without tc tool"
 exit $ksft_skip
fi

if [ ! -x "$(command -v mausezahn)" ]; then
 echo "SKIP: Could not run test without mausezahn tool"
 exit $ksft_skip
fi

if [ ! -x "$(command -v jq)" ]; then
 echo "SKIP: Could not run test without jq tool"
 exit $ksft_skip
fi

bridge link help 2>&1 | grep -q "backup_nhid"
if [ $? -ne 0 ]; then
   echo "SKIP: iproute2 bridge too old, missing backup nexthop ID support"
   exit $ksft_skip
fi

# Start clean.
cleanup

for t in $TESTS
do
 setup; $t; cleanup;
done

if [ "$TESTS" != "none" ]; then
 printf "\nTests passed: %3d\n" ${nsuccess}
 printf "Tests failed: %3d\n"   ${nfail}
fi

exit $ret